Marni, your post made me laugh. Won't say anything more, because the only time someone has told me I was being rude on TE is when I made a comment similar to yours.
However, they found me on the train to class last fall, when a lovely young woman struck up a conversation with me by telling me she "loved my shirt." Thankfully, I got off at the next stop.
When my door gets knocked on, I just point to the mezuzzah and say,"If you see one of these, you probably are not going to make a sale."